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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Immunol
2014 ; 192
(11
): 5343-5353
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Myeloid PTEN deficiency protects livers from ischemia reperfusion injury by
facilitating M2 macrophage differentiation
#MMPMID24771857
Yue S
; Rao J
; Zhu J
; Busuttil RW
; Kupiec-Weglinski JW
; Lu L
; Wang X
; Zhai Y
J Immunol
2014[Jun]; 192
(11
): 5343-5353
PMID24771857
show ga
Although the role of phosphatase and tensin homolog deleted on chromosome 10
(PTEN) in regulating cell proliferation is well established, its function in
immune responses remains to be fully appreciated. In the current study, we
analyzed myeloid-specific PTEN function in regulating tissue inflammatory immune
response in a murine liver partial warm ischemia model. Myeloid-specific PTEN
knockout (KO) resulted in liver protection from ischemia reperfusion injury (IRI)
by deviating the local innate immune response against ischemia reperfusion toward
the regulatory type: expression of proinflammatory genes was selectively
decreased and anti-inflammatory IL-10 was simultaneously increased in ischemia
reperfusion livers of PTEN KO mice compared with those of wild-type (WT) mice.
PI3K inhibitor and IL-10-neutralizing Abs, but not exogenous LPS, recreated liver
IRI in these KO mice. At the cellular level, Kupffer cells and peritoneal
macrophages isolated from KO mice expressed higher levels of M2 markers and
produced lower TNF-? and higher IL-10 in response to TLR ligands than did their
WT counterparts. They had enhanced Stat3- and Stat6-signaling pathway activation,
but diminished Stat1-signaling pathway activation, in response to TLR4
stimulation. Inactivation of Kupffer cells by gadolinium chloride enhanced
proinflammatory immune activation and increased IRI in livers of myeloid PTEN KO
mice. Thus, myeloid PTEN deficiency protects livers from IRI by facilitating M2
macrophage differentiation.